Molding flask



J. A. SPERRY MOLDING FLAQK Filed April 1 1922 IN VENT 0R JOHNA. JPERRY A T RNEY:

Patented Oct; 6, 1925.

"UNITED STATES JOHN A. sP'ERnY, or monnsmnn nnwyonx.

MoLmNGrLAsx'.

Application filed April 19, 1.9.22. :SerialxNo'c555j74.

To all whom it may concern/.2 7

,Be it known: that 1, JOHN A. SPERRY, residing a-t Munnsville, county of Madison, and State of New York, have invented certain new and useful Improvements in a Molding Flask, of which the following is a specification. v

This invention relates to improvements in flasks for usecin molding, and has reference specifically to a guide or centerin pin, by

' means of which the two parts of a ask may beheld in position relatively to one another. One object of the invention is to provide a pin which may be detac'hably mounted to one part of a flask, and provided wlth a resilient portion, so designed as to engage against the walls of a suitable bore formed the other part of the flask, the resilient portion insuring that the two parts of "the flask will be properly centered and locked in position.

Another object of the invention 1s to providea new and improved pin for the purpose described, which shall :be cheaply and strongly made, which shall provide a relatively secure lock for the two parts of the flask, and which shall at the same time offer but little resistance .to the separation of the two parts.

: Other objects and aims of-the invention,

. more or less specificitha-n those refer-red to above, will be in ,part obvious and in :part pointed out in the course of the following description of the' elements, combinations, arrangements of parts and applications of iivprinciples, constituting the invention; and

the scope of protection contemplated will be indicated in the appended claims.

In theiaccomjpanying drawing, wherein I have shown a preferred form of embodimentof my invention: 1

Figure 1 shows a'vertical cross-sectional view through .a two-pant flask, showing the 7 pins operative position.

Figure 2 is a bottomplan View of the cope.-

Figure 3 is .a longitudinalcross+seetion oifone form of-pin.

' Figure ,4 is :a view "elevation of the :pin shown in Figured.

Figure .5 is a VGItlCBdQIOSS-SGCtiOHtLl view of a modified form of pin.

shown in Figure '6.

l igure dis, a viewqshowr :a, modified form of pin, parts being ibrolren laiway.

'Figure 7 is a top plan View ofthe device projects.

Figure 8T'is a view side elevation of a modified formof pin, and.

"Figure 9 is a cross-sectional view of another modification. I l

Referring-now to the drawing, wherein similar reference characters refer :to similar parts throughout the several views thereof, referencecharacter 1 designates a flask here shown to 'he made-of two parts, the refer-' ence character2 designating the cope, and :3 the drag. As, shown in F igure 2,.rthe-cope is provided with lateral projections 4 and 5 having .face's whichplie flush withthe face 6 of {the cope, which is to a butea corresponding face -on the drag These. projecting members 14 and 5-are' provided with handles 7 and 8 respectively, and suitable recesses formed partly in the face 6, and in the proj-ecting members, are plates 19 and 110,: anchored inposition by suitable means, here shown. as screws. The member r9yis shown to have a deep slot 11 out therein,

O PBIllJIgdCO the outer edge of theprojecting member. The member :5 has a bore 1.2:therethrough, thexslot l1 and bore'12 extendingupwardly .a' considerable distance, fora purpose IlOW.itO' be described. i a

, The :drag at its upper edge is provided with suitable plates 13 and 14, correspondi-ng to the plates 9 and 1.0. These plates are provided with apertures through which are inserted thest'hmeaded shanks 15' of conterlng pins, these pins being provided with nuts 16, .by which the pins may be anchored 1 an enlarged portion 17 overlying the face plate :andhere shown to ice 0f an arcuate cross-section, but provided with a flat face 18,. Anchored :by meansof a screw l9'whiohprojects. into .a" suitable aperture gin the upper endxof the enlarged portion 1-7'is a movable member 20,provided near its lower end with a guide pin -21, which projects into a suitable aperture 22 formed in the momher; 17.. Between the members 1 17 and 20 there'cis positioned a slightly :arcuaiteileaf spring 23, :which is anchored on the shank of the screw 1'9lat its upper end, being. also provided with an aperture near its lower end, through which the guide pin "21 Under normal -circumsbances the spring will hold :the member 20 slightly away from the flattened surface of the member 17, as is shown in Figure 3. However, when pressure is placed on the member 20, the spring will collapse and permit the member to lie more closely against the flattened face of member 17.

It will be noted that at their upper ends the members 17 and 20 are slightly beveled so as to be inserted more readily in the bore and slot in the cope. The member 20 is also formed so as to have a flattened surface along its face adjacent the leafspring, the rest of the surface of the member 20 being arcuate, so that when the spring is collapsed, the members 20 and 17 will have a nearly circular cross-section.

In the form shown in Figure 3, the member 20, which will hereafter be designated as the movable member, extends from one end of the centering pin to the other. In the form shown in Figure 5, which corresponds closely to the form shown in Figure 3, the movable member is anchored in a deep notch cut in one surface of the pin 17. The mounting is exactly similar to the mounting shown in Figure 3, there being provided a leaf-spring and guide pin, as before. In the form shown in Figure 6, the fixed member of the pin has a somewhat square crosssection, and is slotted at its upper end, as indicated at 24. The movable member is also provided with a slot 25, corresponding to slot 24, and mounted in these slots is a tongue 26 anchored to both fixed and movable members by pins 27. On their inner faces, near the lower ends, the fixed and movable members are provided with bored seats 28, in which is mounted a coil spring 29, the spring having a tendency to force the two members apart. The action of this pin is as previously described.

In the form shown in Figure 8, the fixed and movable members are formed integrally, the fixed member terminating in its upper end is a very narrow arcuate portion 30, which in turn increases in size to form a depending portion 31, this corresponding to the movable member in the previous form of pin illustrated.

The portion 31 and member 17 are formed with opposed faces 32 and 33 so that as the member 30 is collapsed against the tension of the arcuate portion 30, the two faces will lie in abutting relation. This type of pin may obviously be made in either square or circular cross-section.

In the form of pin shown in Figure 9, the fixed member 17 forms only about half of the complete pin, the movable member 20 extending from one end of the pin to the other, the two parts being normally spaced free of each other by means of the spring 23,

which extends practically the entire length of the pin. The movable member is provided with a guide pin 21, projecting into a bore 22, as previously described in connection with Figure 3, and the movable member is secured to the fixed member by means of a screw 19, which projects into a threaded aperture in the fixed member, the head of the screw lying in a suitable countersunk recess 34. This type of construction has been illustrated in connection with the other types of pins, similar to Figure 9, but not specifically described.

In order to use the pins illustrated, one of these pins is mounted on either side of the drag by means of the threaded shank and nut in the apertures provided therefor. The pins extend upwardly and the pin which is to engage in the slot 11, is so fixed in position that its resilient member will lie against one of the side walls of the slot. WVhen the cope is lowered in position, the bore 12 and the slot 11 are caused to pass over the respective pins, and forced downwardly into position against the pressure of the springs. The friction produced will thereby lock the cope and drag together, and by reason of the fixed positions of the pins, the two parts of the flask may be readily centered and the flask locked in assembled relation. WVhe-n it is desired to remove the cope, the friction of the pins may be overcome by lifting up on the cope by means of the handles, the form of the pins being such as to aid in the release.

It will accordingly be seen that I have provided a guide and centering pin, which is well adapted to attain the objects and purposes set forth. The pin may be cheaply constructed, and is composed of a few parts, which are not easily broken. In the event that the surface of the pin becomes worn after use, the shape of the pin itself will compensate for such wear, so that the cope and drag will be perfectly centered and locked in position with sufiicient rigidity to serve the desired purpose.

As many changes could be made in this construction without departing from the scope of the following claims, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative only and not in a limiting sense.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a device of the class described, in combination with a flask comprising two or more parts, means to center and hold said parts in definite relation including apertured plates mounted on the contacting faces of one of said parts, and pins on another of said parts adapted to enter said aperture, each of said pins having a rigid member and a resiliently held member normally spaced therefrom.

2. In a device of the class described, in

combination with a flask comprising two i or more parts having contact faces, means to center and hold said parts in definite contacting relation, including aperturled plates mounted in the contact face of one of said parts, and pins rigidly secured in the face of another of said parts and adapted to engage in said apertures, each of said pins consisting of a fixed member, a member mounted to swing thereon, and ,resilient! means normally holding said last-named member at the extremity of its swing.

3. In a device of the class described, in-

combination with a flask comprising two or more partshaving contact faces, means to center and hold said parts in definite contacting relation, including apertured plates mounted in the contact face of one of said parts, and pins rigidly secured in the face of another of said parts and adapted to engage in said apertures, each of said pins consisting of a rigid part and a movable part adapted to swing relative to said first named part.

4. In a device of the class described, in combination with a flask comprising two or more parts having contact faces, means to center and hold said parts in definite contacting relation, including apertured plates mounted in the contact face of one of said parts, and pins rigidly secured in the face of another of said parts and adapted to engage in said apertures, each of said pins consisting of a rigid member, almovable member pivotally secured thereto and resilient means to force the free end of said movable member away from said rigid member.

5. In a device of the class described, in combination with a flask comprising two or more parts having contact faces, means to center and hold said parts in definite contacting relation, including apertured plates mounted in the contact face of one of said parts, and pins rigidly secured in the face of another of said parts and adapted to engage in said apertures, each of said pins consisting of a rigid member having an arcuate surface and a flat surface, a similarly shaped movable member pivotally mounted on said rigid member so that the flat surfaces are opposed, and a spring positioned between said members to hold said flat surfaces in spaced relation.

6. In a device of the class described, in combination with. a flask comprising two or more parts having contact faces, means to center and hold said parts in definite contacting relation, including apertured plates mounted in the contact face of one of said parts, and pins rigidly secured in the face of another of said parts and adapted to engage in said apertures, each of said pins consisting of a rigid member provided with an attaching shank, a movable member pivotally mounted near one end of said rigid member, a guide pin on said movable member movable in an aperture in said rigid member, and a leaf-spring mounted between said members and adapted to hold said vmovable memberat the extremity of its pivotal movement.

.In testimony whereof I affix my signature.

JOHN A. SPERRY. 

